Patents by Inventor Jin Yokoyama
Jin Yokoyama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11891939Abstract: An under-floor catalyst (33) includes a GPF (41) capable of trapping fine exhaust particles in exhaust gas, and a downstream-side catalyst (42) positioned on the downstream side of GPF (41). GPF (41) can be supplied with secondary air. When an internal combustion engine (10) is stopped during travel, the secondary air is supplied to GPF (41) in which the fine exhaust particles are accumulated. At this time, the temperature of GPF (41) is equal to or higher than a predetermined temperature. Thus, a deterioration in the exhaust gas purification performance of under-floor catalyst (33) at the time of the start of internal combustion engine (10) can be suppressed.Type: GrantFiled: June 13, 2019Date of Patent: February 6, 2024Assignee: NISSAN MOTOR CO., LTD.Inventors: Jin Yokoyama, Kouichi Murakami, Akikazu Sakai
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Patent number: 11788451Abstract: An internal combustion engine (1) has an electric heating catalyst (5) in an exhaust passage (2). When it is detected that a door has been opened, the electric heating catalyst (5) is preheated. If power of an engine controller (8) is lost during the preheating, information on an estimated temperature, which is stored in the engine controller (8), is lost. The engine controller (8) forbids energization of the electric heating catalyst (5) until a cooling period necessary for temperature of the electric heating catalyst (5) to fall elapses after recovery of the power of the engine controller (8). After the cooling period elapses, the preheating is started again.Type: GrantFiled: May 28, 2020Date of Patent: October 17, 2023Assignee: NISSAN MOTOR CO., LTD.Inventors: Kouichi Murakami, Jin Yokoyama, Akikazu Sakai, Hideaki Takahashi
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Publication number: 20230193799Abstract: An internal combustion engine (1) has anelectric heating catalyst (5) in an exhaust passage (2) . When it is detected that a door has been opened, the electric heating catalyst (5) is preheated. If power of an engine controller (8) is lost during the preheating, information on an estimated temperature, which is stored in the engine controller (8), is lost. The engine controller (8) forbids energization of the electric heating catalyst (5) until a cooling period necessary for temperature of the electric heating catalyst (5) to fall elapses after recovery of the power of the engine controller (8) . After the cooling period elapses, the preheating is started again.Type: ApplicationFiled: May 28, 2020Publication date: June 22, 2023Applicant: NISSAN MOTOR CO., LTD.Inventors: Kouichi MURAKAMI, Jin YOKOYAMA, Akikazu SAKAI, Hideaki TAKAHASHI
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Patent number: 11483019Abstract: A radio-frequency module includes a switch performing switching of the connection between a common terminal and a selection terminal, a reception filter having a reception band in a band A as a passband, a transmission filter that has a transmission band in a band B as a passband and has an output terminal connected to the selection terminal, a filter that has the transmission band in a band B as an attenuation band and has an input terminal connected to the selection terminal, a reception path which connects the selection terminal and an input terminal of the reception filter and on which the filter is disposed, a bypass path which connects the selection terminal and the input terminal of the reception filter and on which no filter is disposed, and a transmission path which connects the selection terminal and a transmission terminal and on which the transmission filter is disposed.Type: GrantFiled: June 18, 2021Date of Patent: October 25, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Motoji Tsuda, Yukiya Yamaguchi, Sho Matsumoto, Hiroyuki Kani, Atsushi Horita, Morio Takeuchi, Yusuke Naniwa, Jin Yokoyama
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Patent number: 11444594Abstract: A multiplexer includes an antenna terminal, first to third filters with different passbands, and first and second phase circuits that adjust the phase of a passing signal. The first filter is connected to the antenna terminal. The second filter is connected to the antenna terminal with the first phase circuit provided between the second filter and the antenna terminal. The third filter is connected to a connection node between the first phase circuit and the second filter with the second phase circuit provided between the third filter and the connection node. In the second filter, an unwanted wave is generated in the first passband of the first filter. The first phase circuit adjusts the phase to provide an impedance in an open state in the first passband at the antenna terminal. The second phase circuit adjusts the phase to provide the impedance in a short-circuited state in the first passband at the connection node.Type: GrantFiled: December 1, 2020Date of Patent: September 13, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventor: Jin Yokoyama
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Publication number: 20220268196Abstract: An under-floor catalyst (33) includes a GPF (41) capable of trapping fine exhaust particles in exhaust gas, and a downstream-side catalyst (42) positioned on the downstream side of GPF (41). GPF (41) can be supplied with secondary air. When an internal combustion engine (10) is stopped during travel, the secondary air is supplied to GPF (41) in which the fine exhaust particles are accumulated. At this time, the temperature of GPF (41) is equal to or higher than a predetermined temperature. Thus, a deterioration in the exhaust gas purification performance of under-floor catalyst (33) at the time of the start of internal combustion engine (10) can be suppressed.Type: ApplicationFiled: June 13, 2019Publication date: August 25, 2022Applicant: NISSAN MOTOR CO., LTD.Inventors: Jin YOKOYAMA, Kouichi MURAKAMI, Akikazu SAKAI
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Patent number: 11381261Abstract: A radio-frequency module includes a transmission path which has one end connected to a transmission terminal and on which a transmission signal in Band A is transmitted; a reception path (62) which has one end connected to a reception terminal (120B) and on which a reception signal in Band B is transmitted; a reception path (63) which has one end connected to a reception terminal (120C) and on which a reception signal in Band C is transmitted; a switch (11) having a common terminal (11a) and selection terminals (11b and 11c); and a switch (12) having a common terminal (12a) and selection terminals (12b and 12c).Type: GrantFiled: July 7, 2021Date of Patent: July 5, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Motoji Tsuda, Yusuke Naniwa, Morio Takeuchi, Atsushi Horita, Jin Yokoyama, Sho Matsumoto, Syunsuke Kido, Yukiya Yamaguchi, Hiroyuki Kani
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Patent number: 11381274Abstract: A transmit-and-receive module includes a multiplexer, a power amplifier, and a low-noise amplifier. The multiplexer includes a transmit filter and a receive filter. The power amplifier and the low-noise amplifier are integrated with each other. In a Smith chart, impedance in a receive band of the receive filter seen from a receive terminal intersects a line connecting a center point of noise figure circles and a center point of gain circles. The center point of the noise figure circles represents the impedance at which the noise figure of the low-noise amplifier is minimized. The center point of the gain circles represents the impedance at which the gain of the low-noise amplifier is maximized.Type: GrantFiled: August 3, 2020Date of Patent: July 5, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Jin Yokoyama, Shiro Masumoto, Syunji Yoshimi
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Publication number: 20220116021Abstract: A filter device includes a piezoelectric substrate including a high acoustic velocity material layer and a piezoelectric layer, and series and parallel arm resonators on the piezoelectric substrate. The parallel arm resonator includes a first IDT electrode on the piezoelectric substrate, and the series arm resonator includes a second IDT electrode on the piezoelectric substrate. First and second busbars of the first IDT electrode include opening formation regions, and an occupancy ratio of areas of openings in the first and second busbars of the first IDT electrode is greater than an occupancy ratio of areas of openings in first and second busbars of the second IDT electrode. In the first and second IDT electrodes, low acoustic velocity regions sandwich a central region. A high acoustic velocity region is provided in the opening formation region of each of the first and second busbars in the first IDT electrode.Type: ApplicationFiled: December 20, 2021Publication date: April 14, 2022Inventor: Jin YOKOYAMA
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Patent number: 11268465Abstract: An internal combustion engine (1) is provided with an exhaust particulate filter (6) disposed in an exhaust passage (4). When the particulate deposition amount and the temperature of the exhaust particulate filter (6) meet a predetermined excessive temperature rise condition, fuel cut during deceleration is prohibited. When a predetermined release condition is satisfied during the prohibition of the fuel cut, the fuel cut is temporarily permitted to perform the regeneration of the exhaust particulate filter (6).Type: GrantFiled: April 26, 2018Date of Patent: March 8, 2022Assignee: NISSAN MOTOR CO., LTD.Inventor: Jin Yokoyama
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Patent number: 11258422Abstract: A communication module includes an input/output switch, a duplexer, a transmit filter, and a receive filter. In the duplexer, a second side is disposed at a position farther from the input/output switch than a first side in a second direction orthogonal to a first direction. Any one of the transmit filter and the receive filter is disposed adjacent to the input/output switch in the first direction.Type: GrantFiled: December 23, 2019Date of Patent: February 22, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventor: Jin Yokoyama
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Publication number: 20210336639Abstract: A radio-frequency module includes a transmission path which has one end connected to a transmission terminal and on which a transmission signal in Band A is transmitted; a reception path (62) which has one end connected to a reception terminal (120B) and on which a reception signal in Band B is transmitted; a reception path (63) which has one end connected to a reception terminal (120C) and on which a reception signal in Band C is transmitted; a switch (11) having a common terminal (11a) and selection terminals (11b and 11c); and a switch (12) having a common terminal (12a) and selection terminals (12b and 12c).Type: ApplicationFiled: July 7, 2021Publication date: October 28, 2021Inventors: Motoji TSUDA, Yusuke NANIWA, Morio TAKEUCHI, Atsushi HORITA, Jin YOKOYAMA, Sho MATSUMOTO, Syunsuke KIDO, Yukiya YAMAGUCHI, Hiroyuki KANI
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Publication number: 20210314010Abstract: A radio-frequency module includes a switch performing switching of the connection between a common terminal and a selection terminal, a reception filter having a reception band in a band A as a passband, a transmission filter that has a transmission band in a band B as a passband and has an output terminal connected to the selection terminal, a filter that has the transmission band in a band B as an attenuation band and has an input terminal connected to the selection terminal, a reception path which connects the selection terminal and an input terminal of the reception filter and on which the filter is disposed, a bypass path which connects the selection terminal and the input terminal of the reception filter and on which no filter is disposed, and a transmission path which connects the selection terminal and a transmission terminal and on which the transmission filter is disposed.Type: ApplicationFiled: June 18, 2021Publication date: October 7, 2021Inventors: Motoji TSUDA, Yukiya YAMAGUCHI, Sho MATSUMOTO, Hiroyuki KANI, Atsushi HORITA, Morio TAKEUCHI, Yusuke NANIWA, Jin YOKOYAMA
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Patent number: 10985785Abstract: A duplexer includes first and second filter circuits and first and second wirings. The first filter circuit allows a signal of a first frequency band to pass therethrough between a first terminal and a common terminal and includes a first resonator which is connected at one end to a line disposed between the first terminal and the common terminal to branch off from the line. The second filter circuit allows a signal of a second frequency band, which is different from the first frequency band, to pass therethrough between a second terminal and the common terminal. The first wiring is connected at one end to the common terminal and is opened at the other end. The second wiring is connected at one end to the other end of the first resonator and is grounded at the other end. The first wiring is electromagnetically coupled with second wiring.Type: GrantFiled: August 7, 2019Date of Patent: April 20, 2021Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Yushi Sugimoto, Jin Yokoyama, Tomohide Aramata
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Publication number: 20210083642Abstract: A multiplexer includes an antenna terminal, first to third filters with different passbands, and first and second phase circuits that adjust the phase of a passing signal. The first filter is connected to the antenna terminal. The second filter is connected to the antenna terminal with the first phase circuit provided between the second filter and the antenna terminal. The third filter is connected to a connection node between the first phase circuit and the second filter with the second phase circuit provided between the third filter and the connection node. In the second filter, an unwanted wave is generated in the first passband of the first filter. The first phase circuit adjusts the phase to provide an impedance in an open state in the first passband at the antenna terminal. The second phase circuit adjusts the phase to provide the impedance in a short-circuited state in the first passband at the connection node.Type: ApplicationFiled: December 1, 2020Publication date: March 18, 2021Inventor: Jin YOKOYAMA
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Publication number: 20210079860Abstract: An internal combustion engine (1) is provided with an exhaust particulate filter (6) disposed in an exhaust passage (4). When the particulate deposition amount and the temperature of the exhaust particulate filter (6) meet a predetermined excessive temperature rise condition, fuel cut during deceleration is prohibited. When a predetermined release condition is satisfied during the prohibition of the fuel cut, the fuel cut is temporarily permitted to perform the regeneration of the exhaust particulate filter (6).Type: ApplicationFiled: April 26, 2018Publication date: March 18, 2021Applicant: NISSAN MOTOR CO., LTD.Inventor: Jin YOKOYAMA
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Publication number: 20200366332Abstract: A transmit-and-receive module includes a multiplexer, a power amplifier, and a low-noise amplifier. The multiplexer includes a transmit filter and a receive filter. The power amplifier and the low-noise amplifier are integrated with each other. In a Smith chart, impedance in a receive band of the receive filter seen from a receive terminal intersects a line connecting a center point of noise figure circles and a center point of gain circles. The center point of the noise figure circles represents the impedance at which the noise figure of the low-noise amplifier is minimized. The center point of the gain circles represents the impedance at which the gain of the low-noise amplifier is maximized.Type: ApplicationFiled: August 3, 2020Publication date: November 19, 2020Inventors: Jin YOKOYAMA, Shiro MASUMOTO, Syunji YOSHIMI
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Patent number: 10771102Abstract: A transmit-and-receive module includes a multiplexer, a power amplifier, and a low-noise amplifier. The multiplexer includes a transmit filter and a receive filter. The power amplifier and the low-noise amplifier are integrated with each other. In a Smith chart, impedance in a receive band of the receive filter seen from a receive terminal intersects a line connecting a center point of noise figure circles and a center point of gain circles. The center point of the noise figure circles represents the impedance at which the noise figure of the low-noise amplifier is minimized. The center point of the gain circles represents the impedance at which the gain of the low-noise amplifier is maximized.Type: GrantFiled: August 6, 2018Date of Patent: September 8, 2020Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Jin Yokoyama, Shiro Masumoto, Syunji Yoshimi
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Publication number: 20200195295Abstract: A transmit/receive module includes plural duplexers, a power amplifier, and a sending transmission line. The plural duplexers operate in bands different from each other and each includes a transmit filter and a receive filter. The power amplifier amplifies signals of pass bands of the plural transmit filters and outputs the amplified signals. The sending transmission line is connected to the plural transmit filters. The signals of the pass bands of the plural transmit filters output from the power amplifier are transmitted through the sending transmission line.Type: ApplicationFiled: December 12, 2019Publication date: June 18, 2020Inventors: Seima KONDO, Satoshi TANAKA, Satoshi ARAYASHIKI, Hiroyuki FURUSATO, Jin YOKOYAMA, Toru YAMAJI, Akio KANEDA, Kiwamu SAKANO, Junichi YOSHIOKA, Tatsuya TSUJIGUCHI, Atushi ONO
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Publication number: 20200127630Abstract: A communication module includes an input/output switch, a duplexer, a transmit filter, and a receive filter. In the duplexer, a second side is disposed at a position farther from the input/output switch than a first side in a second direction orthogonal to a first direction. Any one of the transmit filter and the receive filter is disposed adjacent to the input/output switch in the first direction.Type: ApplicationFiled: December 23, 2019Publication date: April 23, 2020Inventor: Jin Yokoyama